A Twitter feature I’ve wanted to see for a long time is the ability to geo-tag (assign a location) to my tweet and have it only be posted to people’s streams who are in that location.
That is, I tag my tweet for San Francisco and only people who follow me and have set their location for San Francisco can see my tweet.
The tweet should be viewable to anyone who were to look at my profile and it can be retweeted and favored like any other tweet. The difference is that it wouldn’t be posted to people’s streams that haven't chosen to listen to that location. Giving me comfort in knowing I’m not flooding people’s timelines in snowy New England with photos of another ridiculous California sunset.
Anyway, feature requests are really easy to throw out at teams building products when you aren’t inside. It’s just a feature I would love to see someday. Twitter has always operated on one level and I think it would be a nice option to have a second layer I could feel comfortable posting into.